7440491 has 2 divisors, whose sum is σ = 7440492. Its totient is φ = 7440490.

The previous prime is 7440481. The next prime is 7440529. The reversal of 7440491 is 1940447.

It is a weak prime.

It is an emirp because it is prime and its reverse (1940447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7440491 - 2⁶ = 7440427 is a prime.

It is not a weakly prime, because it can be changed into another prime (7440421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3720245 + 3720246.

It is an arithmetic number, because the mean of its divisors is an integer number (3720246).

Almost surely, 2^7440491 is an apocalyptic number.

7440491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7440491 is an equidigital number, since it uses as much as digits as its factorization.

7440491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 7440491 is about 2727.7263425791. The cubic root of 7440491 is about 195.2242959294.

The spelling of 7440491 in words is "seven million, four hundred forty thousand, four hundred ninety-one".